MIXING IN TURBULENT COAXIAL JET

Jet sharpening by turbulent mixing.

Jets or localized strong currents in planetary atmospheres, as well as in the Earth's oceans, are often associated with sharp potential-vorticity gradients owing to the inherent balance exhibited by these flows. Here, we explore and quantify jet sharpening in a simple idealized single-layer quasi-geostrophic model on a mid-latitude β-plane. The advantages of this idealization are that just two ...

Investigation of turbulent reacting mixing processes at high Schmidt numbers in a coaxial jet mixer using OpenFOAM

Turbulent mixing of fluids plays a dominating role in a large number of engineering devices such as combustion chambers, burners, injection systems and heat exchangers. Especially in the context of chemical applications exploration of physical mechanisms of mixing processes is extremely important to control the chemical reactions. Solution of this problem is based on detailed analysis of both h...

Single Jet Mixing at Arbitrary Angle in Turbulent Tube Flow

An asymptotic procedure is presented to evaluate the tracer trajectory in a two-stream turbulent pipe mixing unit with an oblique branch. The proposed mixing jet trajectory estimate is compared with the existing experimental data and used to calculate the critical mixing conngurations. In addition, it is shown that the well-known tracer jet proole can be recovered for the case of a normally iss...

Mixing at the external boundary of a submerged turbulent jet.

We study experimentally and theoretically mixing at the external boundary of a submerged turbulent jet. In the experimental study we use particle image velocimetry and an image processing technique based on the analysis of the intensity of the Mie scattering to determine the spatial distribution of tracer particles. An air jet is seeded with the incense smoke particles, which are characterized ...

Experimental Studies of Inverted - Profile Coaxial Jet Flows